Tenter clip



, April 1931- w. A. STELLING 1,799,446

TENTER CLIP Filed April 5, 1950 ATTORNEYS.

Patented Apr. 7, 1931 UNITED STATES WILLIAM A. STELLING, or rnovmnncn'nFINISHING MAQHINERY COMPANY, OF TION' OF RHODE ISLAND PATENT OFFICETENTEB CLIP Application filed April 3, 1930. Serial No. 441,360.

of, while the clip is not functioning by gripe ping the work.

A still further object of the invention is to so mount the detent pawlthat it will act by gravity to temporarily retain the swinging, jaw inopen position.

The invention further consists in so arranging the detent pawl that itwill engage "and'act thru the work-feeling member that controls thefinal closing movement of the pivoted jaw to retain that jaw in openposition when swung back out of engagement with the work.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described, andparticularly pointed out in the appended claims.

In the accompanying drawings.

Fig. 1 is a perspective view showing my improved tenter clip with thedetent pawl acting to temporarily retain the swinging jaw in inoperativeposition.

Fig. 2 is a central sectional view thru the clip, showing the pivotedjaw in open or inoperative position.

Fig. 3 shows the swinging jaw as closed upon the work.

.Fig. 4 is a detail view in perspective of the detent pawl.

It is found in the practical operation of the standard tenter clip, thatduring the return travel of the chain when the pivoted jaw of the clipis not in engagement with the work, it will naturally swing forwardlyand rest upon the face of the fixed jaw, and that the vibration of theparts during this return travel causes a detrimental Wearing action ingsupportin of the gripping surfaces of these two jaws. I have shown onesimple and effective means for preventing this wearing action, which isthat of employing a detent pawl or member arranged to act upon theswinging jaw upon being moved from operative to inoperative position toretain this jaw out of contact with the fixed jaw during the time theclip is not working and to retain the jaw in that position until againcalled upon to function; and the following is a detailed description. ofthe present embodiment of my invention and showing one construction oftenter clip by which these advantageous results may be accomplishedIVith reference to the drawings, 10 designates the. body of the clip,which is provided with a lower fixed jaw 11 and two overhangarms 12having bearings 13, drilled to receive a pivot pin 14 on which theswinging jaw 15 is pivotally mounted.

In order to hold the swinging jaw out of engagement with the work 16 theusual controller member 17 is pivotally mounted at 18 in the frame ofthe clip, which has a surface 19 arranged to ride upon the work andprevent the jaw from swinging down until the work is drawn outwardlyfrom engagement with the controller, sufficiently to bite the -work.This swinging jaw is provided with a rearwardly extending arm 20 havinga roll 21 engaging the wall 23 of the slot 22 in its controller member,by which construction it will be seen that as soon as the work 16 iswithdrawn from under the controller member the jaw 15 is permitted toswing forwardly and grip the margin of the work and when the stretchedwork is released from the clip the biting edge 24 of the swinging jaw,will naturally in the standard construction of clip lie in engagementwith the cooperating biting surface of the fixed jaw 11. In order toprevent this contact of the swinging jaw directly with the bitingsurface of the fixed jaw, I have provided a detent pawl 25 whichcomprises a shank portion 26 pivoted at 27 in the bracket 28, the rearend of the pawl being turned downwardly as at 29, and forked as at 30,and is provided with an antifriction roll 31 pivoted at 32 therein, and

the forwardly-extending end of this pawl is also provided with ananti-friction roll 33 which may come into engagement with a properlyarranged finger to depress this end and lift the rear end of the pawlout of engagement with the wall 34 of the slot 22 of the controllermember 17.

By this construction, it will be seen that when the swinging jaw 15 ismoved by the usual means (not shown), during the travel of the chain, toopen position, the rear end of this detent pawl 25 will drop into theslot in the controller member and engage the wall 34 thereof, thus thruthis controller retain the swinging jaw in open or inoperative posi tionuntil such time as its roller 33 on the pawl comes in contact with itsreleased finger (not shown) thru the travel of the chain, which againreleases this swinging jaw to perform its normal work gripping function.

By the use of my improved jaw retaining detent, the swinging jaw of eachclip is opened and closed but once, per chain revolution,-as againsttwice in the standard clip,

thus saving fifty percent (50%) of the wear and tear of the aw operatingparts, also by retaining the upper jaw when swung back out of enga ementwith the lower jaw, the wear from vi ration and chatter upon theworkgrippingsurfaces of both jaws is obviated.

he foregoingdescription is directed solely towards the constructionillustrated, but I desire it to be understood that I reserve theprivilege ofresorting to all the mechanical changes to which the deviceis susceptible, the invention being defined and limited only by theterms of the appended claims.

I claim:

1. A tenter clip having a fixed jaw, a coopcrating swinging jaw, amember for controlling the closing movement of said jaw, and gravityactuated means arranged to engage said member and releasably retain saidswinging jaw when moved to released position.

2. In a tenter clip, a fixed jaw, a cooperating swinging jaw, a membermovable relatively thereto and a detent pawl pivotally mounted to actautomatically thru said member upon said swinging jaw to releasablyretain the same when moved to released position.

5. In a tenter clip, a fixed jaw, a pivotally mounted cooperating jaw, aslotted controller member for controlling the closing movement of saidpivoted jaw, and a detent member arranged to engage the wall of saidslot in said controller when the pivoted jaw and controller are moved toreleased position.

6. In a tenter clip, a frame, a fixed jaw, a movable jaw, a controllermember for controlling the movement of the movable jaw, a member pivotedon said frame provided with a roll at one end for engaging saidcontroller member to obstruct its closing permitting movement. r

7 In a tenter clip, a'frame, a fixed jaw, a movable jaw, a controllermember for controlling the movement of the movable jaw, a member pivotedon said frame having one .end positioned to engage said controllermember to obstruct its closing permitting movement, an anti-frictionroll on the opposite end of said member for engagement with the releasefinger.

8. In a tenter clip, a frame, a fixed jaw, a movable jaw, a controllermember for controlling the movement of the movable jaw, a member pivotedon said frame provided with a roll at one end for engaging saidcontroller member to obstruct its closing permitting movement, and ananti-friction roll on the opposite end of said member for engagementwith the release finger.

In testimony whereof I aflix my signature.

WILLIAM A. STELLING.

3. In a tenter clip, a fixed jaw, a cooperating swinging jaw, acontroller member for said swinging jaw, and a swin ing detent membermovable relative to sai controller member mounted to act thru saidcontroller member to releasablyretain said swinging jaw when moved toreleased position.

4. In a tenter clip, a fixedjaw, a ivotally mounted cooperating jaw, acontrol er mem ber for said pivoted jaw, a detent pawl pivotally mountedon the clip to be moved into retaining engagement with said controllerto releasably retain said pivoted jaw when swung back to releasedposition.

